Some sugar occurs naturally in food, such as fructose in fruit and lactose in milk, but sugar is also added to foods during processing. (healthyeating.sfgate.com)
So here's what I suggest: Go fructose - free, except for the natural fructose in fruits and honey. (mindbodygreen.com)
Examples include fructose in fruit and lactose in milk and dairy products. (healthline.com)